role of farmer s organizations in management agricultural services demand as a learning process thesis for is diverse it not spontaneous and relies often on existing offer each context there supply more or less relevant specific institutional set up facilitating continuous dialogue condition building improving the listening capacities niger office irrigation scheme mali 162 villages 65 000 ha irrigated population 270 rice but also vegetable production shallot tomatoes cattle from centralized to liberalization 1984 94 one strong stakeholder du economic differentiation pressure land different views farm diversity 20 family farms conventional types classification size average 3 25ha 14 three accumulation security first 50 impoverishment 30 visions their social by personal engagement farming esteem solidarity water fees maintenance financial mfi input traders village associations va post harvest processing private advice fsc ngo no real